Telegraph printer



Sept l, 1942- H. J. NlcHoLs 2,294,687

TELEGRAPH PRINTER Original Filed Nov. 4, 1939 6 Sheets-Sheet l 66a y 63 46 i L 1i Ji 0 92 'If 42 l l 3 69 67 I 5 a 65 538075 w mi 554 [E 5556 '7l A n. Sai 1 78 7a 58 f 59 a 72 Y I 4 "'97 60a vi 144e M. "4b 1 n 6/ 140,6

l' X-{H' f| 1 12.90 29 75\ r 3 n... 'h 1 75a 233m "m Il l 12a INVENTOR Sept. l, 1942. H. J. NlcHoLs TELEGRAPH PRINTER 6 Sheets-Sheet 2 Original Filed Nov. 4, 1939 .wv/wam .n 45 a am? .m 7T. N 442 M.. 659%@ m R 4 a 55 a6 l v m |180 78 414 D M8780?. 55 .n/v 5 M N m4,. MA .M fw 2 n., m.. 6 a an a C mwm57hv.. ll 9 8 d5 9 v 2 Q.. )L 4 @#5 9 63 J .s6 6 6M.321 'Z 5 8 m s 6 .l l `0 7 7 E FIG] Sept. 1, 1942. H. NICHOLS TELEGRAPH PRINTER Original Filed Nov. 4, 1959 N. l, f

6 sheets-sheet 3 ATTORNEY Sept. 1, 1942.

H. J. NICHOLS 2,294,687

TELEGRAPH PRINTER Original Filed Nov. 4, 1939 SSheets-,Sheet 4 SPL l, 1942- H. J. vNlcHoLs 2,294,687

TELEGRAPH PRINTER original Filed Nov. 4, 1959 6 sheets-sheet s Fis. 24.

INVENTOR y M ATTORNEY sept l, 1942# H. J. NICHOLS 2,294,687

TELEGRAPH PRINTER Original Filed Nov. 4, 1939 6 Sheets-Sheet 6 m naso. o`

200 180 fd y INVENTOR ATirRNEY Patented Sept. l, 1942 STATES PATE ori-ICE TELEGRAPI-I PRINTER Original application November 4, 1939, Serial No.

Divided and this application November 29, 194.0, serial No. 367,114

11 anims. `(c1. 19t-49) This invention relates to printing telegraphy and more particularly to novel shift mechanism for a printing telegraph receiving device wherein a message is recorded by characters formed upon a tape The invention embodies novel shift mechanism controlled conjointly by novel aggregate motion mechanism and by signal controlled means and is a division of applicants copending application Serial No. 302,877, filed November 4, 1939, which has matured into Patent No. 2,275,641, issued March 10, 1942.

More specifically, the device embodying the invention comprises a receiver for printing telegraphy including accumulating mechanism and novel shift mechanism controlled by the accumulator mechanism and by means including the printing mechanism.

Similar devices of the prior art have required complicated shift mechanism controlled by means separate from the printing mechanism.

In view of the above conditions prevailing in the prior art, one of the objects of the present invention is to provide an extremely simple and efficient shift mechanism.

Another object is to provide in a telegraph receiver, novel shifting mechanism controlled by a printing element.

Still another object is to provide in a printing telegraph receiver, novel shifting means comprising simple means, movable in one direction to produce a simultaneous shifting movement at an angle to said direction, thereby providing shifting mechanism of extreme simplicity.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a plan View illustrating one embodiment of the invention.

Fig. 2 is a front end elevation of the device as illustrated in Fig, 1.

Fig. 3 is a detail side view of one of the frictional driving mechanisms of the device in Fig. 1.

Fig. 4 is an end view of the friction element of the mechanism as illustrated in Fig. 3.

Fig. 5 is a plan View, generally similar to Fig. l, with certain parts omitted and others illustrated, to more clearly illustrate the operation of the device.

Fig. 6 is a fragmentary end elevation illustrating the operative elements of the selecting, resetting and accumulating mechanisms.

Fig. 7 is a detail View illustrating the storage tumbler selecting element of Fig. 6.

Fig. 8 is a fragmentary end elevation illustrating the control mechanism for the start-stop shaft of Fig. 1.

Fig. 9 is a fragmentary end elevation illustrating the operative elements of the driving and control mechanism for the printing wheel and accumulator.

Fig. lois a fragmentary end elevation illustrating the operative elements of the driving and control mechanism for resetting the accumulator mechanism and printing wheel.

Fig. l1 is a side elevation illustrating the accumulator mechanism and the drive and control elements for the same.

Fig. 12 is a side elevation in section, illustrating the construction of the accumulating mechanism of Fig. 11 and its connection to the printing wheel shaft.

Fig. 13 is a detail end view of the respective diskelements of the accumulator device.

Fig. 14 is a detail end view illustrating the manner of mounting one of the control pawls of the accumulator upon the respective disks thereof.

Fig. 15 is a detail end View illustrating the pawl element of Fig. 14.

Fig. 16 is a side elevation of the element of i Fig. 15.

Fig. 17 is a detail end View illustrating the construction of the fingered spring disk of the accumulator as shown in Fig. 12.

Fig. 18 is a side elevation of the element of Fig. 17.

Fig. 19 is a view, partly diagrammatic, illustrating the method of operation of the accumulating mechanism.

Fig. 20 is an end elevation of the device of Fig. l, with parts omitte d, illustrating the tape feed and printing mechanisms.

'Fig 21 is a detail end view of the printing and shift control mechanism.

Fig. 22 is a sectional plan view including the mounting of the mechanism as illustrated in Fig. 21.

Fig. 23 is a detail perspective view illustrating the construction of the printing hammer or platen element.

Fig. 24 is a plan view of the printing wheel.

Fig. 25 is an end elevation of the printing wheel.

Fig. 26 is a detail perspective View of the printing wheel shaft slot and pin means for mounting and controllingthe shift mechanism.

Fig. 27 is a detail perspective view illustrating the construction and assembly of the shift actuating mechanism.

Fig. 28 is a detail end view of the ring shaped spring element of Fig. 27.

Fig. 29 is a, detail perspective view of the casing of the shift mechanism.

Fig. 30 is a diagram illustrating graphically the timing of the operations of the various mech.

anisms of the novel receiver for telegraphy.

Referring to the drawings and more particularly to Figs. 1, 2 and 5, the receiver is mounted upon a base 40 carrying plates 4| and 42 in which are journaled the ends of the shafts supporting the several rotary elements.

A motor 43 (Fig. 5) is provided with amain power shaft 44 carrying a pinion 45 meshing with gear 46, provided with a hub 41. Gear 46 is fastened to a shaft 48 by a set screw 49 passing through the hub 41. Shaft 48 has attached thereto the driving element of the start-stop clutch U, which may comprise any type of eccentric, positive action clutch. A start-stop shaft 5|, journaled at one end by shaft 48 and at the other end by plate 4 I, is attached in any desired manner printing to the driven element 58a (Fig. 8) of the startstop clutch 5B. A stop pin 52 is mounted on the driven element 58a to control the rotation thereof and of the start-stop shaft in a manner that will be discussed in detail later,

Mounted on the start-stop shaft 5| for rotation therewith and extending sequentially from the driven end to the front end thereof are a trip lever or #G-disk control cam 53 (Fig. 1), five sequence cams 54, 55, 56, 51, and 58 for sequentially operating the storage tumblers in accordance with the received signals, a tumbler reset cam 59, the #l-disk control cam 66, a tape feed control cam 6|, and the print hammer trip crank 62 (Figs. 5 and 20) When stop pin 52 (Fig, 8) is held by its cooperating elements (see later) the driven cam element 58a is disengaged from the driving element of cam 5D in a manner well known in the operation of such eccentric clutches, and the shaft 5| remains stationary while-motor 43 continues to rotate shaft 48 and the driving element g of start-stop clutch 56. When pin 52 is released,

the driving and driven clutch elements of clutch 5D engage each other and the start-stop clutch rotates one complete revolution, whereupon pin 52 is again engaged by its cooperating element in u the normal course of operation.

Meshing with gear 46 is a gear 63 having a hub 64 attached by screw 64a to auxiliary shaft 65 journaled at one end in plate 42 and at the front end in the plate 4|.

ments 66a of a clutch arrangement comprising a floating gear 61 (Fig. 1). Driving elements 66a abut, respectively, friction rings 68h attached to Attached to the auxiliary shaft by pins 65a (Fig. 3) are the driving elethe gear 61 on opposite sides thereof, whereby the one end in plate 42 and at the front end in. plate 4|. Sleeve 69a is attached to the #-disk of the accumulator 1| for rotation of and control of said disk as will be described in detail later. A pin 69h attached to gear 69 is controlled by cooperating stop means as will be described in detail later.

Meshing with floating gear 68 is a gear 12 (Figs. 1, 11, and 12), carrying a pin 12b controlled by cooperating stop means as will be described in detail later. Gear 12 is mounted on and fastened to the hub 13 of the #l-disk, which hub is fastened by pin 14 to shaft 10 for rotation thereof when gear 12 is released as will be described later.

A combined typewheel and shift device 15 (Figs. 1 and 22) is attached to the front end of shaft 10 for rotation therewith and movement axially thereof as will be described later.

To enable the setting, printing and restoring cycles to be completed during a time interval corresponding approximately to one revolution of the start-stop shaft, the typewheel and the restoring #G-disk are run at slightly more than twice the speed of the start-stop shaft. By means of the 'auxiliary shaft 65 and by the proper choice of the gear ratios, the shaft 65 is driven at desired speed to produce the necessary speed of rotation of the setting disk, typewheel and resetting disk.

Referring to Fig. 6, an electromagnet 16, operated by the line signals, has an armature 11 mounted for oscillation on pivoted axle 18 and is biased by spring means 19 to the olf or deenergized position. A pair of elongated cylindrical members 18a, fastened to axle 18 carry at their ends the utter vane or interposer BIJ.

As will be seen by reference to Fig. 8, the interposer is held in abutting relation to a startstop trip lever 8 l mounted for movement of oscillation in a vertical plane in the back comb 82 and for movement of translation with respect thereto. A front comb 83 provides lateral guides for the trip lever to maintain the oscillatory movement in a vertical plane. When the magnet 16 is energized, the vane or interposer 86 is held as illustrated in Fig. 8 with the hooked end 8|a of the trip lever abutting the edge of the vane. In this position, the sloping lug 8 |b on the trip lever is in engagement with the stop pin 52 on the driven member 50a of the start-stop clutch 50. Upon reception of a start signal, magnet 16 is deenergized, the spring 19 snaps the vane 80 away from the hooked end 8| a of lever 8|, the lever 8| is cammed downwardly, as viewed in Fig. 8, by the action of pin 52 on lug Blb, permitting the pin 52 to pass the lug 8|b, and the start-stop shaft 5| is started on its one complete rotation. As soon as the stop pin 52 has passed the lug 8|b, the trip lever is restored to its operative stop position by means of the spring 8|c.

Referring to Figs. 6 and 7, the five sequence cams 54, 55, 56, 51, and 58 are arranged in a helical series axially and circumferentially of the start-stop shaft 5| and are rotatable therewith into operative position with ve corresponding signal storage tumblers 54a, 55a, 56a, 51a, and 58a (Fig. 5), respectively.

Novel means are now provided comprising the storage tumblers themselves, whereby the signals received by the magnet 16 are sequentially effective and whereby no succeeding signal can be effective until the preceding signal has been completely stored. The storage tumblers are mounted in the back comb 82 fand the front comb 83 .for oscillation in a vertical plane and movement of translation in the direction of the tumblers themselves. .Each tumbler is provided with a heel step 84 normally abutting the back guide comb and a sloping lug 85 cooperating with the respective sequence cam on the start-stop shaft. When magnet 'i6 is deenergized, vane 80 is held away from the position shovm in Fig. 6 and .upon rotation of the start-stop shaft, the lugs 85 cooperate with the respective sequence cams whereby the tumblers are oscillated about the heel step 94 as a pivot. Upon such oscillation, the hooked end 8-1 of the respective tumbler slides behind the interposer 80, thereby blocking the saine from operation until the cooperating cam on the startstop shaft has ridden past, even if the following signal has already begun and has produced its eifect on magnet-I 16. Sufficient time for the storage of each respective signal section and operation of the respective cooperating cam is therefore provided by the novel mounting of the tumblers. Upon energization of the magnet 16, the Vane 99 assumes the position illustrated in Fig. 6 which is such that when none of the tumblers is contacted by its respective cam, a slight clearance exists between the hooked ends 86 of the tumblers and the vane 80 but the vane 80 is located directly below the hooked ends 86. When any sequence cam on the start-stop shaft en- .f

gages its corresponding sloping lug 85, the hooked end of the tumbler engages the end of vane 80 .and the tumbler is oscillated, about the vane 80 as a pivot, until a heel step 81 on the tumbler is moved into alinement with the opening 88 in the back comb. The tumbler is thereupon jerked backwardly bya spring 89 until heel step 81 engages the back comb, as shown in Fig. 6, and the end 98 of the tumbler engages the wedge shaped end of a tripping pawl generally designated as '1' in Fig. 6 to trip the pawl and control the setting of an accumulator disk, so that the selected storage tumbler releases its respective accumulator disk. It is to be noted that even if a sequential signal attempts to operate the magnet 16, the armature is held by the sequence cam acting on the lug 85 holding the hooked end 86 tightly against the vane 80 and thereby holding the armature in place until the respective cam has cleared the tumbler lug. Only the centers of the succeeding signals will therefore be effective and the signal sections will each be properly sequentially stored without interference by the succeeding signal section, and in a simple and direct manner.

A lug 9| is provided on each tumbler which cooperates with a reset vane 92 carried by pivoted axle 93 oscillated by arm 94 which is biased counterclcckwise by a spring 95 connected at one end to the arm 94 land at the other end to an ear porticn 99 of the back comb. Arm 94 carries at the end thereof a follower roller 91 cooperating with the tumbler reset cam 59 on the startstcp shaft At the proper time in the cycle of rotation of shaft 5|, cam 59 engages follower 91, to actuate arm 94 which oscillates axle 93 to move the reset vane 92 against the lugs 9| of each of the tumblers which has been selected, to return the same to normal position with the heel step 84 thereof abutting the back guide comb 82.

Referring to Fig. 9, there is illustrated therein the trip means cooperating with the #l-disk control cam 69 on start-stop shaft 5| for controlling the rotation of the combined printing wheel and shift mechanism and the rotation of the novel accumulator means. Floating gear 68 in the same manner as oating gear 61 is constanty urged to rotate by the friction rings 66h (Fig. 3) as outlined above with respect to gear 61 and meshes with gear 12 mounted on and fastened to the printing or typewheel shaft '|0. Pin 12b is provided on gear 12 cooperating with a lug on one arm 99 of a bell-crank lever |00 to hold the gear 12 in stop position against the torque exerted by gear 68. The other arm 99a is biased clockwise byspring |8I and carries at its end a cam follower 69a cooperating with #1-disk control cam 60 of the start-stop shaft 5|. W'hen the rise of cam 69 engages follower 60a, the timing of which will be described later, the bell-crank |00 is rotated counterclockwise against the force of spring |0I, the lug 90 releases pin 12b and the gear 12 is rotated by the floating gear 68 which is constantly urged into rotation as set forth above. As gear '|2 rotates, it rotates the combined printing wheel and shift mechanism 15 (Fig. 1) in accordance with the setting of the novel accumulator means 1|. If no disk on the accumulator means has been released, a couple is exerted on shaft 10 but its rotation is prevented until one of the accumulator disks is released as will now be described.

Referring to Figs. l1 to 19 inclusive, the novel accumulator or translator means H comprises .the five disks designated as #i1-disk, #2disk, #t3-disk, #Li-disk, and #t5-disk, respectively. The disks are assembled on shaft 'lil as illustrated in Figs. `1'1 and 12, with ve tripping pawls #1(1, #2a, #311, #40., and #5a, respectively, mounted lonthe shaft lil, as seen in Fig. 14, and located .between the respective disks. Each pawl, as will -be seen from Figs. 15 and 16, comprises a wedge .shaped tripping portion T at one end cooperating with the extension 96 (Fig. 6) of the respective storage tumblers whereby the pavvl is tripped or is moved to the right, as viewed in Figs. l1 and l2, against the spring force exerted by a fingered spring disk |92, mounted on the shaft -'|0 as seen in Fig. l2, with lingers i620. (Fig. 17) vengaging the sides of the pawl. Each pawl is -circular in outline and encircles the hub of the respective disk, as seen in Figs. 12 and 14. The opposite end of the pawls is designated as S and comprises the stop end of the pawl which cooperates with the slots Si, S2, S3, Sii, and S5 formed in the circumference of the #l-disk, #2- .disk, #3-.disk, thi-disk, and #5-disk, respectively, (Fig. 13).

Referring to Fig. 13, each of the live disks is shown as providedwith a circumferentially extending slot, the extent of each of the respective vslots varying with the particular disk. The #1,- disk is provided with a slot Sl extending 90 about its circumference and is therefore capable of rotating 8 type wheel units, the #2disk has a slot S2 extending 45 and therefore can rotate 4 type wheel units, the #f3-disk has a slot S3 extending and therefore can be rotated 16 type Vwheel units, the #t4-disk has a slot S6 extending 221/2 and therefore can be rotated 2 type wheel units and the #5-disk has a slot S5 extending 11%" .and therefore can rotate but l unit. By combining the numerical number of units of the respective disks, any number from 1 to 31, inclusive,l can be produced. If no signals are received, the typewheel will remain in Zero position, even though the start-stop shaft is released, since no accumulator disk has been released. The typewheel will remain in its zero position until after the print period of the cycle whereupon the #fi-disk is released to thereby'release the typewheel and it will rotate 360 toreturn to its zero position. The #3-disk is as.- .signed the 180 `slot.or in other words is capable .of 16 units of' rotation, in order Vto facilitate its use with the well known Baudot code. In the Baudot code, the letters shift function is repre,- sented by the signal combination 1, 2, 3, 4, while the figures shift function is represented by the signal combination 1, 2*, 4, 5. As will be described in detail later, the designation of the #t3-disk as the 16 unit disk is essential when utilizing the Baudot code.

As is seen in Figs. 12 and 22, the combined typewheel and shift mechanism is attached to the #l-disk by means of shaft 10, sleeve 13 and pin 14. The #l-disk accumulates all the angles of the tripped disks of higher number and therefore the typewheel will be rotated in accordance with the total accumulation. The #S-disk remains stationary during accumulation and is then set in rotation in the same direction as the #l-disk, to restore the accumulator to Zero and to permit rotation of the typewheel in the same direction of rotation, back to the Zero position Referring to the partly diagrammatic illustration in Fig. 19, the description of the operation of the novel accumulator will be greatly simplified. In Fig. 19, it is assumed that the diameters of the respective accumulator disks have been progressively expanded beginning at the typewheel end. The typewheel 15 is designated as TW and clockwise rotation is assumed, as indicated by the arrow. The ends T of pawls #la to #5a, inclusive, are indicated in their unoperated or untripped position, wherein they are resiliently positioned in a notch N of the corresponding disk and partly within a fitting notch FN in the successive disk, to thereby lock th'e disks against rotation,

Upon actuation of the tumbler 58a (Fig. 5) corresponding to the pawl #1a, the upper end T of pawl #1a, as viewed in Fig. 19, will be moved upwardly (to the right, as viewed in Fig. 11) until the said upper end is located entirely in the fitting notch FN in the #Z-disk. The #1- disk is thereupon released and is prepared for rotation by the float gear 68 (Fig. 9) rotating the gear 12 (when 12 is released by operation of the bell-crank |00) which gear 12 thereupon rotates the #l-disk by means of its sleeve 13 (Fig. 12) to produce rotation of the #l-disk clockwise as viewed in Fig. 19. The #l-disk will therefore rotate past the end S of the #la pawl until the end of the 90 slot SI in the #l-disk abuts end S of pawl #la whereupon rotation is stopped. Upon release of the #Z-disk by tripping of pawl #2a by its corresponding tumbler 51a, the upper end of pawl #2a will be moved upwardly as viewed in Fig. 19 into the fitting notch FN of the #r3-disk and the #2-disk is therefore free to rotate 45. Such rotation is produced by a further rotation of #l-disk which through end S of #la pawl drives #t2-disk. When the #t3-disk is released upon tripping of pawl #3a by tumbler 56a, it is rotated 180 by means of #l-disk and 4t2-disk; when the #4r-disk is released upon tripping of pawl #4a by tumbler 55a it is rotated 22% and when the #t5-disk is released upon tripping of pawl #5a by tumbler 54a it is rotated 111/4". This angular rotation is completely accumulated by the #l-disk which rotates the #Z-disk, while #t2-disk in turn rotates the #t3-disk, etc. When all the pawls #la to #517 inclusive, have been tripped and the respective disks have been rotated, the #l-disk and the typewheel will have rotated a total of 348%c or 31 "units of the typewheel, or in other words, the typewheel will have rotated to the letters shift position, as will be explained later.

If, for example, the #3a pawl, only, had not beentripped; the #l-disk through its rotation with 'the released disks would rotate only 15 units since rotation of the #l-disk is prevented for 16 units when the #l1-disk is not released. This condition is represented in the Baudot code by 1, 2, 4, 5. This rotation of the typewheel would bring it toV the figures shift position, as will be explained later.

If we assume as before that the #l-disk is released but if it be further assumed that the #2-disk, the #t3-disk, the #4-disk and the #5- disk are not released because storage tumblers 51a, 56a, 55a, and 54a, respectively, are not actuated to abut and trip the respective pawls of the accumulator, or in other words, assuming the reception of the Baudot code signal 1, the typewheel would be rotated 8 units and the letter E would be presented on the typewheel at the printing point. It has been assumed that the #i6-disk is held stationary while the accumu. lation is taking place.

After all of the pawls have been selectively tripped or left unactuated in a-ccordance with the signal code received, the #fi-disk is released for rotation in the same direction as the typewheel and the selectively tripped disks whereby the typewheel is returned to its Zero position and the accumulator is reset to zero.

Referring to Fig. 10, the floating gear wheel 61 is constantly urged counterclockwise, as shown, by the friction disk means 60h as seen in Fig. 3. Gear Wheel 61 is held in mesh with gear 69 carrying the lock pin 691) (see also Fig. 1l) Pin '59D is engaged by a lug |03 on the end of arm |04 of the bell-crank lever |05 which is constantly urged in a clockwise direction by spring |06 attached to arm |01 at one end thereof and to a fixed point |08 at the other end thereof. The free end of arm |01 carries a cam follower roller 53a cooperating with the #f5-disk control cam 53 on the start-stop shaft 5|.

After each of the tumblers has been selectively set by the sequence cams 51|, 55, 58, 51, and 58 cooperating with the tumblers 54a, 55a, 55a, 51a, and 58a, respectively, and with the vane 80 of the electromagnet 16, and after each of the pawls #111, #2(1, #3a, #4a, and #5a has been selectively tripped and the respective disks released and after the #t1-disk has been rotated an angular amount equal to the sum of the circumferential angular extents of the slots of the selectively released disks, the rise of cam 53 engages follower roller 53a (Fig. l0) and rotates bell crank |05 counterclockwise against the force of spring |05, so that lug |03 releases pin 69h and gear 69 is thereupon started in rotation by the floating gear wheel 61. Such rotation of gear 69 rotates the sleeve 69a (Fig. '12) to thereby rotate the #6- disk in the same direction as that in Which the #l-disk and the selectively released disks were previously rotated. Upon such rotation of the #-disk, the remaining disks are allowed to rotate and the typewheel will continue its rotation until it has completed 360 of rotation. If, as indicated above, the typewheel has already been rotated 348% by the release of all of the accumulator control disks, or 31 units in all, the typewheel will now rotate 11% more degrees, or an additional unit, `as the #-disk is rotated and the typewheel will then be stopped in its Zero position by engagement of the stop 12b on gear 12 with the lug 98 on bell-crank |00 (Fig. 9) which stop and lug permit one complete revolution only of the typewheel shaft. 1

Y Referring again to Fig. 19, it is seen that as the #f3-disk is rotated, it takes up the slack between thev stop ends S of the pawls and the left hand end of the arcuate slots in each disk. Since the wedge end T of pawl #50 was previously moved entirely into the fitting notch FN of the #6- disk and since the #i-disk was at that time rotated, the notch N in the #Ei-disk, into which end T of pawl #50 normally fits, is not Aalined with the T end of the #50 pawl. Rotation of the #S-disk thereupon rotates pawl #50 clock-- wise bodily so that the stop end S thereof is removed from abutment with the right hand end of the circumferential slot S5, as viewed in Fig. 19, and is -moved clockwise away therefrom until it engages the left hand end of said slot, whereupon the end T of pawl #50 will be alined with the notch N in the #I5-disk and will enter the notch under the stress of spring disk |02 and engage the #-disk. Consequently, the #5-disk and the #G-disk will rotate together until the slack is taken up in the #Li-disk and this same process is repeated with respect to each of the lower numbered disks. Eventually all the disks assume the position as illustrated in Fig. 19 and the #f5-disk having rotated 360, pin 69h (Fig. engages lug |03 and the rotation of the #t6-disk is stopped and the accumulator has been reset for another accumulation to be run up thereon.

Referring to Figs. 2O to 25, inclusive, there is illustrated therein, the novel mechanism for effecting printing in conjunction with the typewheel, which wheel is disclosed in detail in Figs. 24 and 25. The typewheel 150 is provided with two circumferential bands of type characters, placed side by side axially-of the wheel, there being 3| angular printing positions, in addition to the zero position. Five of these positions relate to printing functions, in which positions, the perimeter of the typewheel is -cut back to form a. recess R so that upon operation-of the printing hammer |04 (Fig. 20) the hammer will not strike the typewheel. Y

Printing hammer |04 (Fig. 21) comprises a bell-crank having one arm |040 thereof longer than the other printing'arm lb thereof. Arm |040 is provided with an elongated slot |05 into which is inserted the headed member |06 carried by cylindrical member |060 (Fig. 22) fastened to plate 4|. Member |06 serves as a pivot about which the` printing hammer or platen is oscillated. A generally semi-circular opening |01 is provided adjacent the free end of the arm |040. A headed pin -62 (Figs. 5 and 21) forming the trip crank for the printingarm projects through opening |01 and is eccentrically fastened to the tape feed cam 0|. A-right angle bracket |08 is fastened to plate 4| by ascrew |09 and carries at the upwardly extending end thereof a wedge shaped latch ||0 cooperating with a -notch on arm |040, to hold the printing arm locked in cocked position as shown .in Fig. 21. A compression spring ||2 isfastened to the latch |.|0 at one end thereof and surrounds an'extension ||3 on the arm |0412, which spring when compressed, as illustrated in Fig. 21, urgesv the bellcrank in a clockwise direction, which bell-crank, however, is held in position by latch A||-0 cooperating with notch |||.Y Aplaten orl hammer head H40 extends to the left of arm |0417 as viewed in Fig. 23, the platen being-alined with theproper band of typecharacters bythe shift mechanism, as will be described later. A shifting lug ||4b extends to `the right (or upwardly as viewed in Fig. 22) and provides means for producing shifting, upon actuation of the hammer at one of the shift positions of the typewheel, as will be described later.

As seen in Fig. 21, the printing hammer is cocked and held clear of the typewheel. The start-stop shaft is rotating clockwise as indicated by the arrow and has of rotation remaining to complete one revolution thereof. The trip crank 62 is so positioned that it is about to lift the print hammer clear of the latch H0. When the hammerv |04 is so released from latch H0, the compression spring ||2 drives the print hammer |04 towards the typewheel and the platen H40 forces the tape (Fig. 20)` against the selected` type character, thereby producing printing of the selected character upon the tape. The crank pinv continues to raise the arm |040, which thereby removes platen |40, from the type character and permits return of the typewheel to zero as described above. The crank pin, upon the beginning of the next cycle of rotation of the start-stop shaft, pulls the arm |040 to the right during the first 90 of rotation thereby dropping the notch H back of the latch I0, the hammer remaining cocked in this position during the next 180 of rotation, at the end of which time the crank and hammer are as illustrated in Fig. 21.

Referring to Figs. 21 to 29 inclusive, novel means are illustrated therein for axially shifting the combined typewheel and shift `mechanism 15 to aline the desired band of type with the printing hammer lugy H40. A radially slidable tongue member ||5 having arms |50 and ||5b f and an elongated opening H6 extending d iagonallyy thereof, is provided with a resilient split ring ||1 having one side thereof inserted into an elongated opening IIB in arm |l of the tongue. The free ends H0 and .N90-of said spring abut-one of two pairs of cooperating top and bottom depressions each comprising a top depression |20 and a bottom depression |200 directly beneath, the depression of each pair being formed .in the top and bottom of arm |510 respectively.

A hollow circular hub |2| (Fig..29). is provided with slots |2|0,Y |2|b\, into whichthe arms |50 andk H53, respectively, are inserted. A circumferentially extending groove |10 is formed inthe interior of hub |2| to receive the resilient ring ||1. Openings |22, |220 are. formed in thecircumference of the hub |2|4 and threaded openings I-230 and |235` and a shaft opening |23care formed in the end wall |23 thereof for purposes which will be defined later.`

A slot |24 is formed in the end of shaft 10. (Fig. 26) and an opening |25 is provided in said shaft to kreceive a pin |20 therein.

Screw holes |210 and |210 and-a shaft opening |21c (Fig. 25) are 4provided in the typewheel 150 which openings are so located as to aline rwith openings |230, |230 and |23crespectively, of the hub |2|. s

Hub 2| is mounted upon shaft 10 and the slidable tongue ||5 is inserted into slot |24in shaft 10-with the ends H50 and H55 located in theVY the openings |21a, |2117 alined, respectively, with the threaded openings |23a, |1231).

The typewheel is indexed. to the figures position or the letters position by the Baudot code signals 1, 2, 4, and 1, 2, 3, 4, 5, respectively. Since the translator or accumulator mechanism 1| permits the typewheel to rotate 16 units or 180 in response to signal -3- of the Baudot code, it is seen that the gures and letters positions are 180 apart or in other words, are diametrically opposite. Upon receipt of the letters shift signal at the receiver, the accumulator 1| permits the typewheel to rotate until it assumes the letters position. The typewheel is presumed to be in such a position that the printing platen |4a is alined with the figures band of characters on the typewheel. After the rotation of the typewheel to the letters position and upon actuation of the printing hammer, the platen||4a enters a blank space on the typewheel and the lug H41) abuts the edge of arm H51) thereby moving the slidable tongue H5 to the left as viewed in Figs. 22 and 2'1, the sides of the slot H6 riding on the pin |26 thereby simultaneously shifting the tongue H5 and the combination printing and shifting mechanism 15, axially upward, as viewed in Fig. 22, until the pin |26 abuts the bottom right hand end of slot H6, whereupon the letters band of characters is alined with the platen H4a.

When a figures shift signal is received sequentially to the above, the end ||5a of tongue H5 will be rotated into alinement with the lug H41) and the combined printing and shifting mechanism will be moved axially downward, as viewed in Fig. 22, to aline the figures band of characters with the platen H4a.

. Referring to Figs. l, 2 and 20, there is illustrated therein novel means for feeding the tape from the idler feed spool, across the printing facev of typewheel 15a and across the receiver mechanism to the tape rewind spool. Means are also provided for separately taking up the carbon after the respective carbon and paper tapes of the duplex tape have together passed betweenthe printing elements. Y

A roll of duplex tape |28 comprising the paper tape |2811 (Fig. 1) and carbon tape |2817 (Fig. 20) is Vwound upon an idler spool |29 mounted by hubs or sleeves |29a for rotation on a rewind shaft I 30 journaled in plates 4| and 42. A grooved pulley |3| is fastened to shaft |30 for rotation thereof, well known snap fastening means being provided between the pulley |3| and the shaft |30 whereby the pulley can be easily detached to allow removal of idler spool |29. A grooved pulley |32 is mounted on and connected to a shaft |33.upon which are also sequentially mounted, in back of pulley |32, a grooved pulley |34 and a feed ratchet wheel |35, bothattached to the shaft. A Well known type of spring tension belt |36 is connected between pulleys |3| and |32 whereby the pulley |3| is rotated upon rotation of pulley |32 on shaft |33. A grooved pulley |31 is mounted on shaft |38 carrying a carbon take up spool |39. A flexible belt A|36a connects pulleys |34 and |31 whereby shaft |38 is rotated upon rotation of shaft |33 bythe ratchet wheel |35 as will now b e described.

' Referring t0 Fig. 20, a pawl |35a, is pivotally mounted on the end |40a of an elongated follower lever |40 pivoted at 4| 'I'he end |4019 of the follower lever abuts the tape feed cam 6| and is resiliently held in contact therewith by means of spring |3511 attached to pawl |3511, at one end and to the plate 4| at the other end thereof. As the start-stop shaft 5| (Fig. 5) rotates thereby rotating the tape feed cam 6|, cam 6| carrying the trip crank 62 rotates to release the print hammer as above described and upcn continuing the rotation thereof a fiat side Gia of cam 6| is alined with the follower lever end |4012. Spring |3511 thereupon rotates lever |40 counterclockwise and ratchet |3561 is placed behind a succeeding tooth on ratchet wheel |35. As cam 6| continues its rotation, the fiat side 6 la thereof is removed from contact with lever end |401) and the full circumference oi the cam engages |4017 whereby lever |40 is rotated clockwise to move the ratchet pawl |3511. to the left to thereby advance ratchet wheel |35 one tooth. Rotation of wheel |35 rotates shaft |33 and pulleys |32 and |34 (Fig. 2) thereby rotating pulleys |29 and |31, respectively, to rotate the rewind shaft |30 and the carbon take up spool |39. The far side of rewind shaft |30 has removably attached thereto a tape rewind wheel |02 (Fig. 1).

The duplex tape is fed from idler spool |29, between the feed surface of ratchet wheel |35 and the tape jockey roller |350, between guides |43, and between the typewheel 15a and the platen I |411.. After passing between the typewheel and the platen, the carbon and paper tapes are separated and the paper tape |281; is fed across the guide surface |4461, across the receiver to guide surface |4417 (Fig. 1), and thence to the rewind spool |42 where the message is stored. The carbon tape |285 however, is fed upwardly from the typewheel (Fig. 20) to the carbon take up spool |39 at the same time that the record tape |28a is being fed across the receiver to the rewind spool |42 as above described. The sizes of the respective pulleys are so chosen that the rewind and take-up spools always tend to wind up the paper tape and carbon tape faster than the duplex tape is fed for printing.

The operation of the device and particularly the sequential relationship of the operation of the various elements will be more clearly understood when described in connection with the timing diagram of Fig. 30. The angular amounts of rotation of the respective elements are all referred to the rotation 0f the start-stop shaft and since the typewheel and accumulator disks revolve more rapidly than the start-stop shaft as explained above, the extent of their angular motion is illustrated in terms of rotation of the startstop shaft. Upon receipt of the start element or section of the signal, which in the present instance, is deemed to be a deenergized condition of the line or an off condition represented by start in Fig. 30, electromagnet 16 (Fig. 6) is deenergized, armature 18a (Fig. 8) is released, the start-stop trip lever 8| releases pin 52 and the start-stop shaft 5| begins to rotate, the timed relation being as illustrated in Fig. 30. Upon receipt of the first signal element or section which will be assumed to be a condition of energization of the line or an on condition, as represented by Ia in Fig. 30, the storage tumbler 58a, represented by Ic in Fig. 30 and controlling the #l-disk of accumulator 1|, will be held by armature 18a in position to be operated by sequence cam 58, represented by IB in Fig. 30, to force lug (Fig. 6) of tumbler 58a against wedge element T of pawl #la to trip the pawl which when gear 12 vis released, will release the #l-disk for 90 of rotation thereby permitting a 90 rotation of the typewheel, represented in terms of rotation of the Y start-stopI shaft by ID of Fig. 30. Upon tripping of the #la pawl, as is seen from Fig. 30, the #1- disk does not rotate and the typewheel shaft is not immediately released for rotation, since control cam 6D, called the #i1-disk control cam, on the start-stop shaft (Fig. 9) does not operate bell-crank through cam follower 60a to release stop 98 from engagement with stop pin 12b until later, the release being timed to occur after the restoring cycle is completed whereupon floating gear 68 drives gear 'l2 to rotate the typewheel shaft and the typewheel under the control of the released #l-disk as described above. The operation of the #l-disk control cam 60 is timed to release the #l disk as indicated in Fig. 30. If all of the signal elements from l to inclusive are on signals, the storage tumblers 51a, 56a, 55a, and 54a. represented in Fig. 3() by IIC, IIIc, IVG, Vc, respectively, will be actuated at the center of signal elements IIA, IIIA, IVA, VA, respectively, by their respective sequence cams 51, 56, 55 and 54 represented in Fig. 30 as IIB, IIIB, IVB and VB, respectively, to thereby trip the pawls #2a, #361, #lla and #5a, respectively, as indicated n Fig. 30. While pawl #2a. is tripped as indicated in Fig 30, since we have assumed that pawl #la was also tripped, and since the `#ft2-disk is not driven by the #l-disk, until the tf1-disk has rotated 90 (Fig. 19) the #Z-disk will not start its rotation until the rotation of #1-disk is completed as illustrated in Fig. 30. The #3- disk will begin its rotation, however, as soon as pawl #3a is tripped, as indicated in Fig. 30, since the #i2-disk has completed its rotation, before pawl #3a is tripped.

Pawl #411, however, is tripped before the #3- disk has completed its rotation and therefore the #4-disk will not begin its rotation until the #3- disk has fully completed its 180 rotation as illustrated in Fig. 30.

Upon tripping of pawl #511., the #Ea-disk will immediately begin its rotation since the rotation of the #fl-disk is completed a short time before pawl #5a is tripped, which tripping occurs at the center of signal element or section VA as illustrated in Fig. 30. After the #f5-disk has been released and the typewheel shaft rotated the 111A,o pertaining to this disk, the shaft is momentarily stopped by the stop end S of pawl #5a engaging the end of the circumferential slot S5 in the #i-disk.

Shortly thereafter the #t6-release cam 53 (Fig. 1) releases pin 69h on gear 69 connected to the #i6-disk, to thereby permit floating gear 61 to rotate gear 69 (Fig. ll), sleeve 69a and the #6- disk to thereby restore the typewheel and the accumulator disks.

Just prior, however, to the release of the #6- disk, as is seen from the diagram of Fig. 30, the trip crank 62 (Fig. 2l) releases the trip hammer 104 and the platen Illia forces the duplex tape |28 against the selected letter or figure character to print the same upon the record tape I28a. rlhe trip crank thereupon removes platen I|4a from engagement with the tape whereupon the #f3-disk driven by its sleeve 69a, and the gear 69, begins the rotation of the typewheel as explained above in its same direction of rotation to the zero position thereof where it is stopped by pin 12b engaging stop 98 (Fig. 9) and likewise rotation of #fi-disk restores the accumulator disks to their initial position during the restore part of the cycle as indicated in Fig. 30.

While the accumulator disks are being restored, as is seen from Fig. 30, the flat part 6 la (Fig. 20) of cam Bl permits movement of pawl I35a to the right and thereuponV cam 6l moves the pawlto the left to actuate the ratchet wheel |35 to advance the tape.

During this same part of the cycle, cam 59 (Fig. 6) actuates cam follower 91 and lever 94 to operate the reset vane 92 to reset the storage tumblers as indicated by reset in Fig. and the start-stop shaft is stopped shortly thereafter by pin 52 (Fig. 8) engaging with lug lh on the start-stop trip lever 8|.

The #S-disk has meanwhile been restoring the accumulator disk, and as is seen from Fig. 30 this restoration continues even after the startstop shaft has been stopped and subsequently released for rotation on its succeeding cycle and such restoration continues up to the time that sequence cam 58 again engages storage tumbler 58a in the middle of the first section Ia of the succeeding signal. An overlap is therefore provided so that the operation of the receiver can be started .while a translator or accumulator is being restored to zero position.

Novel means are therefore provided whereby a simple compact receiver for printing telegraphy is provided, wherein the signals are restrained in their eifect to their sequential occurrences, wherein restoration of the typewheel and accumulator occurs in the same direction of rotation as during the setting thereof, and wherein an extremely simple and effective mechanism is provided.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modication it will Vbe understood that various omissions and substitutions and 'ch-anges in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is'the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

l. In a device of the character described comprising a double typewheel, means for bringing said wheel to a stop in a selected position, printing means mounted for movement radially of said typewheel and into engagement therewith, and means for axially shifting said wheel including a radially movable member positioned automatically in the path of movement of Vsaid printing means to be moved radially thereby in said selected position of said typewheel, and means effective upon radial movement of said member by said printing means to change the radial movement of said member to axial movement thereof to produce axial shift of said wheel.

2. In a device of the character described comprising a double rotatable typewheel, means for selectively stopping the rotation of said Wheel, shift means mounted to rotate with and impart shifting movement to said typewheel, and power driven printing means movable with respect to said typewheel and engageable with said shift means, upon stoppage of said typewheel in a preselected position, to supply power to operate said shift means.

3. In a device of the character described comprising a double typewheel, a printing member movable toward and away from said typewheel, a movable member actuated by movement of said printing member, means mounting said movable member for motion having components diametrically and axially of said typewheel upon actuation of said movable member, and means for delivering only said axial component to said typewheel.

4. In a printing telegraph comprising a shaft, a double typewheel mounted for rotation with said shaft and relative movement axially of 'said Shaft, a printing member movable toward said typewheel and generally radially of said shaft, and a diagonally slidable member actuated by movement of said printing member and cooperating With said Wheel and shaft to produce relative axial movement therebetween.

5. In a printing telegraph comprising a shaft, a double typewheel mounted for rotation with said shaft and relative movement axially of said shaft, a power driven printing element movable toward said typewheel and generally radially of said shaft, and means for directly converting the radial movement of said printing element to relative axial movement only of said shaft and wheel.

6. In a device of the character described comprising a shaft, a typewheel mounted for axial movement on said shaft, a slidable member formed with a diagonal opening, means mounting said member on said shaft for movement radially thereof, means on said shaft cooperating with the walls of said diagonal opening for converting the radial movement of said member to axial movement, and means transmitting said axial movement to said typewheel.

7. In a device of the character described comprising a shaft, a typewheel movably mounted on said shaft, a slot extending axially of said shaft, a slidable member in said slot, an opening in said member extending at an acute angle to said shaft, means on said shaft extending into said opening, and means interconnecting said type- Wheel and member.

8. In a printing telegraph comprising a shaft, a typewheel movably mounted on said shaft, a slot extending axially of said shaft, a slidable member in said slot, an opening in said member extending at an acute angle to said shaft, means on said shaft extending into said opening, an opening in said member extending radially of said shaft, impressions on the sides of said member, a circular split ring having one side in said radial opening and the ends thereof selectively engageable in said impressions, means holding said ring in position with respect to said shaft, and means transmitting the movement of said Y slidable member to said typewheel.

9. In a printing telegraph comprising a shaft, a member mounted for movement axially and radially of said shaft, a typewheel mounted for axial movement on said shaft, means on said shaft cooperating with said member and said Wheel to maintain them in assembled relation with said shaft, means on said member coopeiating with said shaft means for converting radial movement of said member to axial movement, and means transmitting said axial movement to said wheel simultaneously with said radial movement.

10. In a printing telegraph, a shaft, a slot in said shaft, a radially movable member in said slot, type means carried by said shaft and connected to said member, and means on said shaft engaging means on said member and constraining said member to move axially, simultaneously with its radial movement, to thereby impart axial movement to said type means.

11. In a printing telegraph, a shaft, a slot in said shaft, a type member mounted on said shaft for movement thereon, a slidable member extending radially through said slot and connected to said type member, an elongated diagonally extending aperture in said slidable member, and means on said shaft engaging the sides of said elongated aperture.

HARRY J. NICHOLS. 

